Gravity, not a bigger engine, drives Parker Solar Probe's sun-speed record

Parker Solar Probe reached a record ~430,000 mph near the Sun not primarily through propulsion, but through seven Venus gravity assists over seven years that gradually lowered its solar orbit. As the probe fell closer to the Sun, the Sun's gravity converted potential energy into kinetic energy, making it the fastest human-made object in history. The feat highlights orbital design and gravity as key drivers in spaceflight, while the mission continues to study the Sun’s corona and solar wind.